# FORM FLOW PILATES vs SIX13Studio

The clearest difference is ads: SIX13Studio at none against FORM FLOW PILATES's shown. FORM FLOW PILATES's advantage is update cadence (every 3 weeks vs every 4 months) and iOS requirement (14.0 vs 16.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FORM FLOW PILATES ships an update every 3 weeks, SIX13Studio every 4 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | FORM FLOW PILATES | SIX13Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 125 MB | 121 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [FORM & FLOW PILATES LLC](https://appshunter.io/developer/1809899720) | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) |

## What reviewers say

### FORM FLOW PILATES

[App page](https://appshunter.io/ios/app/form-flow-pilates/id6756178656)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### SIX13Studio

[App page](https://appshunter.io/ios/app/six13studio/id6767050546)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FORM FLOW PILATES free?

FORM FLOW PILATES is free to download, with no in-app purchases.

### Is SIX13Studio free?

SIX13Studio is free to download, with no in-app purchases.

### Do FORM FLOW PILATES or SIX13Studio have ads?

FORM FLOW PILATES shows ads; SIX13Studio does not.

### Which is updated more often, FORM FLOW PILATES or SIX13Studio?

FORM FLOW PILATES ships an update every 3 weeks, and SIX13Studio every 4 months. Most recently, FORM FLOW PILATES was updated on October 7, 2026 and SIX13Studio on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*